Bolter drive



2 Sheets-Sheet 1 m w w m m M Di 3 WM V v m 7 0 0 m M P. n w H w. E.NORVELL BOLT-ER DRIVE Filed March 3, 194:5

April 24,,1945- w. E. NQRVELL 2,374,451

BoLTER DRIVE Filed March 8, 1943 2 Sheets-Sheet 2 I i V 38 5 37 'WILLIALI E N RVELL ATTORNEY Patented Apr. 24, 1945 UNITED STATES PAT ENT OF FIGE l w o 2,374,451

to e. DRIVE williarn E. No r viell, Kansas Aplilicationhflarch 8, 1943,sefialNo. 478,481 isoiei s. (c1. 2059:3665) My'invention relates tobolters, "and more particularly to a 'drive'for bolters.

In flour-sitters or'bo'l'ters, it isdesirableto provide a "gyratorymotion tofthe bolter body cone tain'ing the sieves. This gyratory motionshould vary in rate as well as in radius of ,gyration for differentmaterials that are to be separated by the boltero It is desirable thatthe radius of gy ration be capable of very fine and accurate adjustmentto glet 'the'desired bolting actionfor the particular material that isto 'be acted on by the bolter, and it is desirable that the motion thatis produced by the niieans moving the bolter 'to produce the siftingaction Jbea tr'ue gyratory motion.

It is an important purpose'of my invention to provide new and improvedmeans for producing a gyratorymotion in a bolterthatisre'adilyatljustabre so as to produce a gyration of the bolter mourite'drotatable weights, which after having beenfiset into motion and afterhaving attained their desired rate of rotation, set up a gyratory motionof the desired radius of g'yrationof the bolte'r, saideocentrical'lyarrangediveights being,

Preferably, each or 'said 'rotat'able wheellike inein'bersi'sproviddwith "a weight spaced from the axisof rotation thereof, whi'ohrhasthe'same mass as that of the weights provided on the other wheer-nkerotatable members, and the adjustrnen't'of thecente'r of mass isobtaihedby'rota'tme one n'iernber'of eachpair' about the axis ofretation relative to the otherme mber of each pair, one of 1 the membersof each pair being fire-e on the shaft carrying said memher'sso as tonot be adjustable 'thera'l-du'nd; and the other -mem'lie'r er thatthesam a'n be 'adjusted tofanyposinon desired aroupoith ax s or the'shafit.Preferably, the parrot members above and the pair of members: below theholter Body are adjusted tion to firovide new anermorov'e'o "nieains fordrivpreferably, made up of means located adjacent thetop of the bolterand means located adjacent the bottom of the bolte'r and rotating abouta comr'non axis, "so that the eocentrically mounted weight above the topor the bolter and the eccentricalliy mounted Weight below the bottom ortation thereof, comprises a pair of rotatable members, which are,preferably, of a wheel-like character, and which are each provided witha weight that is mounted eccentri'cally to the axis of rotation of saidmembers, which are relative- 1y adjustable to vary the position of saideccentricaily mounted Weights relative to each other, toothus adjust thecenters of mass of said rotatahle members relative to each other,whereby very fine "adjustment of the locatioh of l the cen;

ter of massof each ofsaid pair of members relative to the axis ofrotation can be obtained,

- n themes taxrati a. Bi

mg "afbolter so that these-me ha gyratory inotion, cofnprising a driveshaft, 'vv'hich is aligned lIy with th axis of yration or the "e i s thehe ea fl tqfil' w? t e l di fi of "gyration, so that the drive "shaftwin lieft y hisi rr ag m t n re ayed. Qi Qtt dri e mernber being ,a

vi b

un es r b e v. ,lssa' lto mm. a 1 i- 'edtion between thejdriv'e d saidiklmean tt err on of the device can be star ed, at th devic at, tains ts d e' r the um a al J int is in; operative, in that the shaft portionor; on side eo i in true the l nment w th th shaft Po n n the o her sidet ereof and. the zcou Fling h 1 th u ive sa min .act'j mer l a an ordinay shaft coupling latter the speed of gyration desired a has v beenattained, with the a k properly a uste so tha th .leln ths h crank armwilllbe the same as the radius of gyration oithe bolter. o l

Other objects andadvantages of my invention will appear as thedescription oft he drawings proceeds. I desire to have it understood,however, that I do not intend tovlio it myself .tothe particular detailsjshown or described, except as defined in the claims.

crankmemb'er, said crank In the drawings:

Fig. l is a perspective view of a bolter to which my improved drivingmeans is applied, the supporting means for the bolter and the driveshaft being partly broken away.

Fig. 2 is an elevation of the bolter driving means producing thegyratory motion, the gyratory shaft being partly broken away and onlyfragments of the bolter body being shown.

Fig. 3 is a fragmentary enlarged view partly in section and partly inelevation, showing the mounting of a pair of the wheel-like members onthe gyratory shaft.

Fig. 4 is a perspective view of the adjustable crank member forming partof my invention.

Fig. 5 is a bottom plan view taken substantially on the line 55 of Fig.2 on a slightly enlarged scale.

Fig. 6 is a section taken on the line I5--6 of Fig. 2 on a slightlyenlarged scale, and

Fig. 7 is a vertical sectional view through the adjustable crank memberforming part of my drive. I

Referring in detail to the drawings, my bolter comprises a'body portionII], which may be of conventional construction as far as its generalarrangement is concerned, and which, of course, contains the sieves thatare usually provided in the bolter. Said body portion may be providedwith a frame that has a plurality of members running in variousdirections, such as the members II, upon which the bearings 12 and I3for the shaft I4 are mounted. Said shaft l4 extends vertically of thebolter body between the two sections thereof lying in the space I5provided between said bolter body sections, so as to be locatedsubstantially centrally of said bolter body. The bolter body is,.preferably, mounted so as to be capable of a gyratory motion, thisbeing preferably accomplished by means of a plurality of Wooden reedsI6, which are provided substan- The shaft I4 has mounted thereon a pairof wheel-like members I8 and 19 adjacent the top of .the body l0 and apair of wheel-like members and 2| adjacent the bottom of said bolterbody I0. Each of the wheel-like members is of a similar character, andone wheel-like member of each pair is a duplicate of a wheel-like memberof the other pair, In the arrangement shown, the wheel-like members I8and29 are duplicates, and the wheel-like members I9 and 2| areduplicates. Each of said wheel-like members 20 and I8 are provided witha hub portion 22, which is provided with a key-Way cooperating with asimilar keyway in the shaft l4 to secure the wheel-like members l8 and20 in fixed position on said shaft I4 by means of a key 23, Each of thewheel-like members 19 and 2| is provided with a hub portion 24, which isprovided with a set screw engaging the shaft I4 for clampingsaidwheellike members I9 and 2| in position .on said shaft, so as torotate therewith, said wheel-like members being, however, adjustablearound said shaft,

as willbe obvious. A washer 26 may be provided tially atthe corners ofthe bolter body, being sebetween the head of the set screw and the hubportion 24, if desired.

Referring to Figs. 5 and 6, it will be noted that the wheel-like member2| is provided with a plurality of spokes 21 extending from the hub tothe rim thereof, and that a Weight 29, similar to a counterweight, isprovided between certain of said spokes 21, said weight 28 lying at aspaced point from the hub 24 and extending from the rim of saidwheel-like member2l inwardly a uniform distance, so as to form a weightof a given mass having its center of mass at a certain definitely spaceddistance from the axis of the shaft I4. The wheel-like member 20, as faras its construction otherwise than at the hub is concerned, is aduplicate of the wheel-like member 2|, having spokes 27', similar to thespokes 21, and having a counterweight portion 28 that is a duplicate insize, location and mass relative to the axial center'of the wheel, ofthe weight member 28. The wheel-like member I9 is provided with spokes29 and with a weight 39 extending inwardly from the rim thereof, whichis similar in all respects to the weight 28 provided on the wheel-likemember 2| and is, preferably, of the same mass and similarly locatedrelative to the axis of the shaft I4 as said weight 28. Also thewheel-like member I8 is provided with spokes 29, similar to the spokes29, and with a weight 39' that corresponds in size, location and mass tothe weight 39 of the wheel-like member I9.

It will be obvious that thennbalanced condition of the rotating systemmade up of the wheellike members I8 and I9, and the rotating system madeup of the wheel-like members 20 and 2I can be varied between a maximum,with the weight-like members-28 and 28', and the weightlike members3|).and 3D in axial alignment with each other and a minimum, with theweight-like members 28 and 28' diametrically opposite each other, andthe weight-like members 39 and 30 diametrically opposite each other.When said weight-like members 28 and 28, and 39 and 30', arediametrically opposite each other there will be no gyration of the bodymember I0 and any degree of adjustment of the amount of gyration betweenthe maximum obtainable in the manner above referred to, and thisminimum, or zero, gyration can be obtained by adjusting the wheellikemembers I9 and 2| relative to the wheel-like members I8 and 29 to getany desired relative position of the weights 28 and 28 and 30 and-30about the axis of rotation of the shaft I4. Obvi ously a very fineadjustment of the gyratory movement of the bolter body Ii) can beobtained in this manner, and if the upper pair of members I 8 and I9 andlower pair of members 20 and 2| are carefully adjusted so that therelative position of the members !8 and I9 and of the members 20 and 2!is substantially the same, the unbalanced weight creating the gyrationwill ,be the same above and below said body, thus avoiding all stressesdue to a lack of balance between the weight above and below the bolterbody and producing a true gyratory motion about a-center or axis that isparallel to the drive shaft to be described below.

The shaft I4, with which the Weighted members rotate, is driven from thedrive shaft 3!, which may be mounted in bearings in any desired manner,so as to extend vertically downwardly from above the bolter, through adriving means made up of a pair of relatively adjustable members 32 .and33. The member 33 is provided with an upwardly extending stub shaftportion 34,

to adjustthe center of mass of each of said rotatable means relative tois center of rotation.-

l 2.-In a bolter, a flexibly mounted body portion 1 and means forproducing a gyratory motion thereof, comprising rotatable means aboveand below said body portion, each of said rotatable means having itscenter of mass adjustable relative to its center of rotatiomand meansfor rotating said rotatable means comprising a drive shaft, a shaft uponwhich said rotatable means are mounted,

and a crank of adjustable throw connecting said shafts. i

3. In a bolter, a flexibly mounted body portion and means for producinga gyratory motion thereof, comprising rotatable means above and belowsaid body portion, each of said rotatable means having its center ofmass adjustable relative to itscenter of rotation, and means forrotating said said rotatable members having its center of mass eccentricto its center of rotation, said members being relatively adjustable toadjust the centers of mass thereof relative to each other.

5. In a bolter, a flexibly mounted body portion and means for producinga gyratory motion thereof, comprising rotatable means above and belowsaid body portion, each of said rotatable means comprising a pair ofrotatable members, and means for rotating the same about a common axiscomprisin a drive shaft, a shaft upon which said rotatable means aremounted, and a crank of adjustable throw connecting said shafts, each ofsaid rotatable members having its center of mass eccentric to its centerof rotation, said members being relatively. adjustable to adjust thecenters of mass thereof relative to each other to adjust the center ofmass of each of said rotatable means relative to its center of rotation.

6. In a bolter, a drive shaft, a bolter body, flexible means forsuspending the same, a gyratory shaft mounted for rotation on said body,an adjustable crank connecting saidshafts, and rotatable means on saidgyratory shaft above and below said body portion, each ,of saidrotatable 4 means having its center of mass adjustable relative. to theaxis of rotation of said gyratory shaft.

7. In a bolter, a drive shaft, a bolter body, flexible means forsuspending the same, a gyratory shaft mounted for rotation on said body,an adjustable crank connecting said shafts, and rotatable means on saidgyratory shaft. above and below said body portion, each of saidrotatable bolter body, a pair of wheel-like members mounted on saidshaft adjacent the top of said body and a pair of wheel-like membersmounted on said shaft adjacent the bottom of said body, each of saidmembers being provided with a weight mounted eccentrically of saidshaft, one of said members of each pair being mounted in fixed positionon said shaft and the other member of each pair being adjustable aroundsaid shaft, to adjust the relative. position of said weights, and meansfor rotating said shaft to cause said bolter body togyrate. I v

v 9. In a bolter, a bolter body, flexible means for suspending the sameto permit gyration thereof; a shaft mounted to rotatein bearings on saidbolter body, a pair of wheel-like members mounted' on said shaftadjacent the top of said body and a pair of wheel-like members mountedon said shaft adjacent the bottom of said body, each of said membersbeing provided with a weight mounted eccentrically of said shaft, one ofsaid members of each pair being mounted in fixed position on said shaftand the other member of each pair being adjustable around said shaft, toadjust the relative position of said weights, a crank comprising a pairof longitudinally adjust able members, one of said members being fixedto said shaft, and the other of said members having a stub shaftprojecting therefrom, a drive shaftand a universal joint connecting saiddrive shaft and said stub shaft. v

10. In a bolter, a bolter body, flexible means for suspending the sameto permit gyration thereof, a shaft mounted to rotate in bearings onsaid bolter body, a pair of wheel-like members mounted on said shaftadjacent the top of said body and a pair of wheel-like-members mountedon said shaft adjacent thebottom of said body, each of said membersbeing provided with a weight mounted eccentrically of said shaft, one ofsaid members of each pair being mounted in fixed position on said shaftand the other member of each pair being adjustable around said shaft toadjust the relative position of said weights, a crank comprising a pairof longitudinally adjustable members having interfltting tongue andgroove portions slidably engaging, one of said members being fixed tosaid shaft, and the other of said members having a stub shaft projectingtherefrom, a drive shaft and a universal joint connecting said driveshaft and said stub shaft' 11. In a bolter, a bolter body,flexible meansfor suspending the same to permit gyration thereof, a shaft mounted torotate in bearings on said bolter body about a substantially verticalaxis, a pair of wheel-like members mounted on said shaft adjacent thetop of said body and apair of Wheellike members mounted on said shaftadjacent the bottom of said body, each of said members being providedwith a weight mounted eccentrically of said shaft, the Weights on eachof said members being of substantially the same mass and shape andmounted the same distance from the center of rotation of the Wheel-likemember on which it isprovided, one of said members of each pair beingmounted in fixed position on said shaft and the other member of eachpair being rotatable around said shaft to adjust the same to anyposition around said shaft, to adjust the relative position of saidweights, means for fixing said rotatable member to said shaft for anyposition thereof and means for rotating said shaft to cause said bolterbody to gyrate, comprising a vertical drive shaft and a universal jointconnecting said first mentioned shaft and the lower end of said driveshaft tosuspend'said first shaft therefrom for freedom of movement withsaid body.

12. In a bolter, a bolter body, flexible means for suspending the sameto permit gyration thereof, a shaft mounted to rotate in bearings onsaid bolter body, a pair of wheel-like members mounted on said shaftadjacent the top of said body and a pair of wheel-like members mountedon said shaft adjacent the bottom of said body, each of said membersbeing provided with a weight mounted eccentrically of said shaft, theweights on each of said members being of substantially the same mass andshape and mounted the same distance from the center of rotation Of thewheellike member on which it is provided, one of said members of eachpair being mounted in fixed position on said shaft and the other memberof each pair being adjustable around said shaft to adjust the relativeposition of said weights, a crank comprising a pair of longitudinallyadjustable members, one of said members being fixed to said shaft, andthe other of said members having a stub shaft projecting therefrom, adrive shaft and a universal joint connecting said drive shaft and saidstub shaft. l

13. In a bolter, a bolter body, flexible means for suspending the sameto permit gyration therethe same in adjusted position. WILLIAM mountedeccentrically of said shaft, the weights on each of said members beingof substantially the same mass and shape and mounted the same distancefrom the center of rotation of the wheellike member on which it'isprovided, one of said members of each pair being mounted in fixedposition on said shaft and the other member of each pair beingadjustable around the shaft, to adjust the relative position of saidweights, a crank comprising a pair of longitudinally adjustable membershaving interfitting tongue and groove "portions slidably engaging, oneof said members being fixed to said shaft, and the other of said membershaving a stub shaft projecting therefrom, a drive shaft and a universaljoint connecting said drive shaft and said stub shaft, said membersbeing provided with means indicating the spacing of the axes of saidshafts extending therefrom and having means for clamping E. NORVELL.

